Electrically-heated tool.



H. HERTZBERG, A. A. LOW & M. J. WOHL. A

ELECTRIGALLY HEATED TOOL.

APPLICATION FILED NOV. 4,1907.

Patented Apr". 25, 1911.

W/TNESSES Hurra s'rnras PATENT onirica,

HARRY HEBTZBERG, OF NEW YORK, ABBOT A. LOW, OF HORSESHOE:.AND MAURICE J'.

WOHL, F NEW YORK, NQY., ASSIG'NOBS ECONOMY ELECTRIC CIYIPANY,4 OIF IBR NEW YORK.

, BY DIRECT AND MESNE. ASSIGNMENTS, T0 OOKLYN, .NEW YORK, A` CORPORATION 0F ELECTEICALLY-HEATED TOOL.

Patented Apr. g5, 1911.

Application filed November 4, 1907. l Serial No. 400,725.

To all whom it may concern:

Be it known that we, HARRY HERTZBERG, ABBor A. Low, and Mannion J. W013i., citizens of the United States, residing, res ectively, in the city of New York, boroug of Brooklyn, county of Kings, .and State of New York; Horseshoe, county of St. Lawrence,

and State of New York, and city of New York, borough of Manhattan, county and State of New York, have invented certain .new and useful Electrically-Heated Tools, of which the following is a specification.

This invention appertains to electrically heated tools, and, more particularly, to portable toolssuch as soldering irons, sad irons, branding irons, and analogous devices.

' In electrically heated tools of the prior fart, of the types specified, various disaddirect the hixg ,maximum heating effect by causing all the vantages are inherent, among which may be particularly mentioned the inability to reg-- .culties specified, as well as others, in that it 4embodies means whereby the temperature of the heated. element may be eectually controlled within the limits of temperature usually required in devices of the character under consideration.

In a practical embodiment of the invenvtion,.vve provide means whereby the current may be caused to iiow simultaneously through a plurality of heating units adapted to be :connected in series, or separately through fheating units of high and low resistance. This enables at least three heats to be secured, first, a low heat by causing the cur- ',rent to pass through the two heating units lin series; second, a higher temperature byy all the current to iow through resistance unit, and, third, the

current to How through the low resistance' heating unit. g

In the accompanying drawing, we have illustrated different practical embodiments of the invention, but the construction shown .therein is tol be understood as illustrative, only, and notas dening vthe limits of invention.

Figure l1 is a longitudinal section, with parts in elevation, illustrating the invention wherein a plurality of heating units are incased within the body or mass of metal. Fig. 2 is a sectional elevation through an electrical connection adapted-to be adjusted to direct a current through the heating units individually or collectively, the'plane of the `section being indicated by the dotted line 7-7 of Fig. 3. Fig.l 3 is a. detail -view in end elevation of one member of the separable coupling shown in Fig. 2, and employed in the tool of Fig. -1. Fig. 4 is a diagram illustrating a plurality of heating units and the separable coupling adapted to switch the current, through said heating units collec-J tively or separately. -Fig. 5 is a diagram illustrating a plurality of heatingu'nits with an external resistance and the combined coupling and switch.

The metallic mass or body, A', in Fig. 1

is provided with a. chamber for the reception 'of the two heating'units, M, O, each composed of a resistancel wire or ribbon wound on a thin flat core of insulating material.

The heating units are spaced so as to have contact with the respective walls yof the chamber in the body, A, and they are held in close contact with said walls by an interposed metallic member, N, the latter having mechanical engagement with respective heating units and also with a body, A. To the body, Af, is united a hollow stock, B2, which is provided with the handle, C2. It is preferred, however, to provide the handle, C2, with the member, P, of a coupling, and this member is adapted for enf gagement with the complemental member,

, of said coupling. f

The wire composing the heating unit, M, is of high resistance, whereas the wire composing heating unit,-O, is of low resistance. As shown in Fig. 1, the hi h resistance heating unit, M, is ositione adjacent to the point of the soldbring iron. Furthermore,

the two heating units are spaced along the Y length of the metallic mass composing the branched by the conductor o to the wire m,

body of the soldering iron, and said units cooperate with the interposedmetalllc member, N, so as to be retained 1n close Contact with said metallic mass.

The member P is shown as consistin of a plural/ity of sections p, p', p2, whic are held together by an external sleeve 1", sa1 d members being fastened to the sleeve in dlvidu'ally by suitable screws 'r'. The coupling is divided lengthwise so as to produce the aforesaid sections, and said sections clamp the posts s, s", s2, `in said coupling member P. The section Q of the ,coupling is similar.

in construction to the section P,`that` is to say, it is divided so vas to form a series of sections which are inclosed by a sleeve t, and are fastened in place by screws t. Said coupling member` Q is provided with a plurailty of socket sleeves u, u, u2, indicated more clearly in Fig. 4. The posts of the member P, are adapted for engagement with the sleeves of the member Q in a variety of ways according to the temperature desired to be imparted to the body A', whereby the separable coupling is adapted to serve as a switch for controlling the admission of current to the heating units M, O. The member Q is provided with a bushing L', and through this bushing is adapted to pass the `conducting cord K', the wires of which are attached to the sleeves u', u2, as indicated in Fig. 5. The electrical connections from the posts ofthe member P to the heating units are shown diagrammatically in' Fig. 4, in which it will be seen` that the resistance M is provided with conductors m, m', which are attached to the posts s', s2, respectively, whereas the heating unit O is connected at one end by a conductor o with the post s, whereas the other end of said unit O, is

of the heating unit M.

` The member Q of the coupling is adapted to be placed in a variety of positions with respect to the complemental member P, said member Q being capable of rotary or axial adjustment so as tochange the relation of the sleeves to the posts. The member Q when placedopposite to the member P for the posts s, s', s2, to enter the sleeves u, u, u2,

respectively, the current passes from the post s', through the conductor m, to the high resistance of the heating unit M, and

thence back by the conductor m', to the post s2, and the sleeve u2, whereby the current is directed to the high resistance unit M, the low`resistance heating unit O being cut out of circuit. The metallic body A is thus adapted to be heated to a medium temperature by the heating unit M. By changing the position of the member Q relative to the member'P so as to bring the sleeve u', into engagement with the post s, the sleeve u2, into engagement :with the post s', and the sleeve u, into engagement with the post s2, the current is set through the low resistance heater O, the high resistance M beinocut out of circuit, whereby the metallic Dbody is adapted to be heated to a higher temperature.

The relation of the member Q to the member P may be still further changed by turning said member Q to a position where the socket u2, will receive the posts, the sleeve u, will engage with the post s, and the sleeve u will engage with the post 82 whereby the two heaters will be connected in series, thus including the two heating units in the circuit for the current to flow through them simultaneously, thereby securing a minimum heating effect on the body, A.

By reference to Fig. l it will be noted that the high resistance M is next to the pointed end of the iron, whereas the low resist-ance heater O is next to the middle portion of thev iron. l

In Fig. 5 of the drawings, we have shown a plurality of heating units, and the multiple connection and switch, adapted for use in connection with an external resistance T which may be carried in the stock or handle of the tool.'l rhe member Q of the connection is adapted to be shifted with relation to the member P for the purpose of bringing the heating units M, O, individually into service, or said member Q may be shifted so as to also include the external resistance T in series with one of the heating units.

Having thus fully described the invention, what we claim as new, and desire to secure by Letters Patent is 1. In an electrically heated tool of the class described, a body composed of a mass of metal, saidbody being provided with a longitudinal chamber 'closed at one' end and open at the other end, a hollow stock rigidly fastened to said body and extending .outwa-rdly therefrom, `a metal member positioned within the* chamber and extending lengthwise of the body, said metal member being. in contact at its sideand end"':edges with the body and having its, faces spaced relative to the walls of the chamber, ahigh resistance heating unit positioned between the walls of said chamber andthe metal member, a low resistance heating unit also positioned in the spaces between the walls of said chamber and the metal member, ythe respective heating units being positioned at different portions of the body intermediate the ends thereof, a coupling member attached to the hollow stock, said coupling member havin electrical terminals connected to the heating units, and a second coupling member having similar electrical terminals, the second coupling member and its tively.

first named coupling memher for controlling thel flow of current through the separate heating units' or through said units collec- 2. In an electrically vheated tool of the class described, e body composed of et chamhered mass of metal solid and closed at one portion and substantially open at another portion, a plurality of heating units positioned Within the body, said heating units vloeing of di'erent electrical resistances,

provided' with similar terminals, said sec? ond coupling member being adjustable reletive to the irst coupling member for controlling the .ow of current separstely@ throughr the heating units or through seid units collectively.

ln'testimony `whereof We have signed our names to this specification in. the presence of two subscribing Witnesses.

.HARRY HERTZBERG.

Ancor A. Low. MAUMCE J. WOHL.

Witnesses:

M. A.-WAR11EN, GEO. WELLING GIDDINGS. 

